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A Study on Improvement of Inflow/Infiltration Computation and Application Method in Sewer Rehabilitation Project

하수관거정비사업의 침입수/유입수 산정 및 활용방법 개선방안에 관한 연구

  • Received : 2013.10.15
  • Accepted : 2014.02.10
  • Published : 2014.02.15

Abstract

In this study, current sewer infiltration/Inflow(I/I) computation and application method was examined about improvement and adequacy relating to the main issues raised by the field for practitioners. The results of review about infiltration calculation method were considered to be in need of improvement at 'standards of minimum sewage calculation'. Furthermore, the results of review about I/I application method were considered to be in need of improvement at 'standards of seasonal infiltration application' and 'the relative decrease in the Annual evaluation standards'. In addition, annual I/I analysis at JC County for the four years(2009~2012) in respect of operation flow and rainfall data was conducted. The result of annual infiltration analysis, compared average daily sewage generated average infiltration rate was found in 21.95 %, infiltration by unit was found in $0.31m^3/day/cm/km$ and $0.12m^3/day/day$, respectively. The result of annual inflow analysis, average rainfall - Inflow equations was found $y=5.499{\times}$($R^2$ 0.793), and the average Inflow quantity by sewer extension was predicted to $0.66m^3/mm-km$.

Keywords

Sewer Rehabilitation Project;I/I Computation;I/I Analysis;BTL

References

  1. An, B. M. and Song, H, M.(2011) Analysis on the result of I/I calculation by the exiting method and the standardized manual method, Journal of Korean Society of Water and Wastewater, 25(2) pp. 213-221
  2. An, D. H. and Kim, J, O.(2013) Analysis on Effectiveness of Sewer Rehabilitation Project and Study on Improvement of Fixed Flow Meters, Journal of Wetlands Research, Vol. 15, No. 4, pp. 461-469 https://doi.org/10.17663/JWR.2013.15.4.461
  3. Chang. D. H., Han I. S., Woo. B. H. and Hong. S. J.(2009) Analysis of Correlation Between Defective Number of Sewer Pipes and I/I(Infiltration/Inflow) Volume, Journal of Korean Society of Water and Wastewater, 23(3), pp. 321-329
  4. Lee, J. H.(2009) Index of Infiltration in Sewer Rehabilitation, Master's Thesis for a degree, Chung-Ang University
  5. Ministry of Environment(2008) Study on Computation and Application of Infiltration/Inflow Suitable for Domestic Conditions
  6. Ministry of Environment(2009(a)) Sewer Rehabilitation Projects(BTL) implementation guidelines
  7. Ministry of Environment(2009(b)) Standard Manual for the Computation of Sewage Conduit Infiltration & Inflow
  8. Oh, J. I., Lee, J. h., Jin, S. K.(2013) Queries for Standard Sewer Infiltration/Inflow Assessment, Journal of Korean Society of Water and Wastewater, 27(2), pp. 285-290

Cited by

  1. Investigation and Analysis for Outside Project Area for Understanding the Case of Effectiveness Reduction of BLT Project vol.18, pp.5, 2018, https://doi.org/10.9798/KOSHAM.2018.18.5.311